The trend reflected a general attitude of tolerance toward small possessions and was a necessary response to an ever-increasing court caseload. In response to community pleas, the crack task force of the Denver (Colo.) Police Department has used the search warrant with unprecedented frequency -- 670 since its creation in October 1987. Success required streamlining of the process, cooperation, protection of the confidentiality of informants except under rare circumstances which demand revelation, technical expertise in writing the warrants, an on-call system for judges, and use of a tactical team for making immediate entries.